ET200S 1SI WITH YASKAWA J1000

Hello Tushar;

Marcjan is right,you will get much better help here if you demonstrate some work on your part.

Start by understanding the functions for Modbus RTU required by the 1SI module from this manual:

SIMATIC ET 200S Serial interface modules

Next, study the following:

Sample program ET200S 1SI MODBUS zXX21_11_1SI_MODBUS.zip for TIA Portal V 11.0 + SP 2

This will help you build one Modbus RTU exchange with one of your drives (of course you must stuy the Yaskawa manual to know what Modbus addresses you want to read and write to in this drive).

I suggest you test this first data exchange with a test drive, until you validate the controls. This is the part where we can help you out best, replying to your spoecific questions.

Then you need to call your Modbus functions with specific Send_DB for everyopne of your drives one by one. That's right, you will need 20 instances of your modbus master functions, with a different Send+DB containing a different slave address, one for each of your drioves,

Hope this helps,

Daniel Chartier

Hello William;

Your last post triggered a bit of doubt, so I searched the Yaskawa drives webpages for the J1000.

Under the available options for this drive there are 2 communications boards, one for Modbus RTU RS-485, the SI-485/JCN5 module.

See the following link:

https://www.yaskawa.com/pycprd/products/industrial-ac-drives/microdrives/j1000-drive/tab1/link10

Information on Memobus/Modbus communications are available in the following documents:

Technical Note: Modbus vs. Memobus Comparison

Tech Manual, appendix C (notice all registers are shown with hexadecimal addressing, these will need to be converted to decimal values when you request them through a Siemens master).

Hope this helps,

Daniel Chartier